TREX (transcription export) is responsible for:

A. splicing of mRNA.
B. transport of mRNA.
C. editing of mRNA.
D. degradation of mRNA.


A, B

Biology & Microbiology

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Of the following bacterial species, which is associated with a serious diarrheal illness with high mortality rates among some populations?

a. E. coli b. Shigella spp. c. Salmonella spp. d. Vibrio spp.

Biology & Microbiology

Digestion is ________.

A. Only chemical B. Only mechanical C. Both mechanical and chemical D. Neither mechanical nor chemical

Biology & Microbiology

What aspect of a population is critical in determining

a species in Ernst Mayer’s “biological species concept”? a. similar physical appearance b. similar patterns of behavior c. capability to interbreed d. common habitat e. similar nutritional requirements

Biology & Microbiology

Which organisms would most likely be present on the bottom or closest to the attachment surface of a complex microbial biofilm?

A. Facultative chemoorganotrophs B. Anaerobic sulfate-reducing bacteria C. Eukaryotic protists D. Cyanobacteria

Biology & Microbiology